-import type { AbstractPoolWorker } from '../abstract-pool-worker'
import type { IPoolInternal } from '../pool-internal'
-import { PoolType } from '../pool-internal'
-import { DynamicPoolWorkerChoiceStrategy } from './dynamic-pool-worker-choice-strategy'
+import type { IPoolWorker } from '../pool-worker'
+import { FairShareWorkerChoiceStrategy } from './fair-share-worker-choice-strategy'
+import { LessBusyWorkerChoiceStrategy } from './less-busy-worker-choice-strategy'
+import { LessUsedWorkerChoiceStrategy } from './less-used-worker-choice-strategy'
+import { RoundRobinWorkerChoiceStrategy } from './round-robin-worker-choice-strategy'
import type {
IWorkerChoiceStrategy,
+ RequiredStatistics,
WorkerChoiceStrategy
} from './selection-strategies-types'
import { WorkerChoiceStrategies } from './selection-strategies-types'
-import { SelectionStrategiesUtils } from './selection-strategies-utils'
+import { WeightedRoundRobinWorkerChoiceStrategy } from './weighted-round-robin-worker-choice-strategy'
/**
* The worker choice strategy context.
*
- * @template Worker Type of worker.
- * @template Data Type of data sent to the worker. This can only be serializable data.
- * @template Response Type of response of execution. This can only be serializable data.
+ * @typeParam Worker - Type of worker.
+ * @typeParam Data - Type of data sent to the worker. This can only be serializable data.
+ * @typeParam Response - Type of response of execution. This can only be serializable data.
*/
export class WorkerChoiceStrategyContext<
- Worker extends AbstractPoolWorker,
- Data,
- Response
+ Worker extends IPoolWorker,
+ Data = unknown,
+ Response = unknown
> {
- private workerChoiceStrategy!: IWorkerChoiceStrategy<Worker>
+ private readonly workerChoiceStrategies: Map<
+ WorkerChoiceStrategy,
+ IWorkerChoiceStrategy
+ >
/**
* Worker choice strategy context constructor.
*
- * @param pool The pool instance.
- * @param createDynamicallyWorkerCallback The worker creation callback for dynamic pool.
- * @param workerChoiceStrategy The worker choice strategy.
+ * @param pool - The pool instance.
+ * @param createWorkerCallback - The worker creation callback for dynamic pool.
+ * @param workerChoiceStrategy - The worker choice strategy.
*/
public constructor (
- private readonly pool: IPoolInternal<Worker, Data, Response>,
- private createDynamicallyWorkerCallback: () => Worker,
- workerChoiceStrategy: WorkerChoiceStrategy = WorkerChoiceStrategies.ROUND_ROBIN
+ pool: IPoolInternal<Worker, Data, Response>,
+ private workerChoiceStrategyType: WorkerChoiceStrategy = WorkerChoiceStrategies.ROUND_ROBIN
) {
- this.setWorkerChoiceStrategy(workerChoiceStrategy)
+ this.execute.bind(this)
+ this.workerChoiceStrategies = new Map<
+ WorkerChoiceStrategy,
+ IWorkerChoiceStrategy
+ >([
+ [
+ WorkerChoiceStrategies.ROUND_ROBIN,
+ new RoundRobinWorkerChoiceStrategy<Worker, Data, Response>(pool)
+ ],
+ [
+ WorkerChoiceStrategies.LESS_USED,
+ new LessUsedWorkerChoiceStrategy<Worker, Data, Response>(pool)
+ ],
+ [
+ WorkerChoiceStrategies.LESS_BUSY,
+ new LessBusyWorkerChoiceStrategy<Worker, Data, Response>(pool)
+ ],
+ [
+ WorkerChoiceStrategies.FAIR_SHARE,
+ new FairShareWorkerChoiceStrategy<Worker, Data, Response>(pool)
+ ],
+ [
+ WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN,
+ new WeightedRoundRobinWorkerChoiceStrategy<Worker, Data, Response>(pool)
+ ]
+ ])
}
/**
- * Get the worker choice strategy instance specific to the pool type.
+ * Gets the worker choice strategy in the context required statistics.
*
- * @param workerChoiceStrategy The worker choice strategy.
- * @returns The worker choice strategy instance for the pool type.
+ * @returns The required statistics.
*/
- private getPoolWorkerChoiceStrategy (
- workerChoiceStrategy: WorkerChoiceStrategy = WorkerChoiceStrategies.ROUND_ROBIN
- ): IWorkerChoiceStrategy<Worker> {
- if (this.pool.type === PoolType.DYNAMIC) {
- return new DynamicPoolWorkerChoiceStrategy(
- this.pool,
- this.createDynamicallyWorkerCallback,
- workerChoiceStrategy
- )
- }
- return SelectionStrategiesUtils.getWorkerChoiceStrategy(
- this.pool,
- workerChoiceStrategy
- )
+ public getRequiredStatistics (): RequiredStatistics {
+ return (
+ this.workerChoiceStrategies.get(
+ this.workerChoiceStrategyType
+ ) as IWorkerChoiceStrategy
+ ).requiredStatistics
}
/**
- * Set the worker choice strategy to use in the context.
+ * Sets the worker choice strategy to use in the context.
*
- * @param workerChoiceStrategy The worker choice strategy to set.
+ * @param workerChoiceStrategy - The worker choice strategy to set.
*/
public setWorkerChoiceStrategy (
workerChoiceStrategy: WorkerChoiceStrategy
): void {
- this.workerChoiceStrategy = this.getPoolWorkerChoiceStrategy(
- workerChoiceStrategy
- )
+ if (this.workerChoiceStrategyType !== workerChoiceStrategy) {
+ this.workerChoiceStrategyType = workerChoiceStrategy
+ }
+ this.workerChoiceStrategies.get(this.workerChoiceStrategyType)?.reset()
+ }
+
+ /**
+ * Executes the worker choice strategy algorithm in the context.
+ *
+ * @returns The key of the chosen one.
+ */
+ public execute (): number {
+ return (
+ this.workerChoiceStrategies.get(
+ this.workerChoiceStrategyType
+ ) as IWorkerChoiceStrategy
+ ).choose()
}
/**
- * Choose a worker with the underlying selection strategy.
+ * Removes a worker from the worker choice strategy in the context.
*
- * @returns The chosen one.
+ * @param workerKey - The key of the worker to remove.
+ * @returns `true` if the removal is successful, `false` otherwise.
*/
- public execute (): Worker {
- return this.workerChoiceStrategy.choose()
+ public remove (workerKey: number): boolean {
+ return (
+ this.workerChoiceStrategies.get(
+ this.workerChoiceStrategyType
+ ) as IWorkerChoiceStrategy
+ ).remove(workerKey)
}
}
repositories / poolifier.git / blobdiff